Compare Cisco - Transceiver module - GBIC - Gigabit EN - 1000Base-CWDM - 1590 nm (CWDM-GBIC-1590=) Transceiver to Cisco 10GBASE XENPAK - Transceiver module - XENPAK - 10 Gigabit EN - 10GBase-SR - 850 nm (XENPAK-10GB-SR=) Transceiver

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